Pursuant
to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):
November 14, 2013

LAMAR ADVERTISING COMPANY

(Exact name of registrant as specified in its charter)

Delaware

0-30242

72-1449411

(State or other jurisdiction

of incorporation)

(Commission File

Number)

(IRS Employer

Identification No.)

5321 Corporate Boulevard, Baton Rouge, Louisiana 70808

(Address of principal executive offices and zip code)

(225) 926-1000

(Registrants telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

¨

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

As previously announced, Lamar Advertising Company (the Company) is actively considering an election to real estate investment trust (REIT) status
and, in conjunction with that review, submitted a private letter ruling request to the U.S. Internal Revenue Service (the IRS) in November, 2012 regarding a potential REIT election. In June 2013, the Company was advised by the IRS that
it was conducting a study of the current legal standards it uses to define real estate for purposes of the REIT provisions of the U.S. Internal Revenue Code of 1986, as amended (the Code).

On November 14, 2013, the Company was advised by the IRS that it will resume issuing private letter rulings regarding the REIT provisions of the Code and
that the IRS is actively working on the Companys private letter ruling request. The Company does not intend to provide interim updates with respect to the specifics of its ongoing discussions with the IRS in conjunction with its ruling
request.

The timing of any IRS response remains uncertain and the Company is not able to predict when it will receive a definitive response to its
private letter ruling request. The Company has no reason to conclude that it will not be in a position to convert to a REIT effective for the taxable year beginning January 1, 2014. The Company is also in the process of implementing a corporate
restructuring so that it will be in compliance with applicable REIT rules prior to December 31, 2013.

The Companys decision to proceed with a
REIT election is subject to the approval of the Companys board of directors. A favorable IRS ruling, if received, does not guarantee that the Company would succeed in qualifying as a REIT and there is no certainty as to the timing of a REIT
election. The Company may not ultimately pursue a conversion to a REIT, and it can provide no assurance that a REIT conversion, if completed, will be successfully implemented or achieve the intended benefits.

Cautionary Note Regarding Forward-Looking Statements

Certain information included in this current report is forward-looking in nature within the meaning of Section 27A of the Securities Act of 1933 and
Section 21E of the Securities Exchange Act of 1934. This report uses terminology such as believes, plans, expects, intends, may, will, should,
potential, and continue and similar expressions to identify forward-looking statements. Examples of forward-looking statements in this report include statements about our intention to make an election to REIT status, the
timing of any such REIT election and the Companys ability to qualify as a REIT. The forward-looking statements in this report are based on our current good faith beliefs; however, actual results may differ due to inaccurate assumptions, the
conclusions, if any, reached by the IRS in connection with its study and any changes or refinements made to current legal standards by the IRS or other foreseeable or unforeseeable factors. Consequently, we cannot guarantee that any of the
forward-looking statements will prove to be accurate. The forward-looking statements in this report speak only as of the date of this report.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by
the undersigned hereunto duly authorized.